Home / 2,166.21-2,989.17-1,221.93

Finding the Fourth Proportional to 2,166.21, 2,989.17 and 1,221.93

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Solution

The fourth proportional to 2,166.21, 2,989.17 and 1,221.93 is: 1,686.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.21 : 2,989.17 = 1,221.93 : x
  2. Step 2: Convert to fraction form
    2,166.21/2,989.17 = 1,221.93/x
  3. Step 3: Cross multiply
    2,166.21x = 2,989.17 × 1,221.93
  4. Step 4: Simplify right side
    2,166.21x = 3,652,556.50
  5. Step 5: Solve for x
    x = 3,652,556.50/2,166.21
  6. Step 6: Final answer
    x = 1,686.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.